Hi I am looking for a bike for a heavy rider. My husband is 6’1” 350 lbs. we will only be doing short rides on bike paths or maybe in town for a little exercise. Trying to keep it less than$5000. I was looking at the Rad wagon Cargo. Are there any other options? He has some knee issues so a step through would be great but not an absolute necessity. Would a trike be a better option? I am getting a Go Cycle G4 but it won’t hold his weight. Any advice would be most Welcome.